Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab1669d32229a70…

MALICIOUS

PDF

69.0 KB Created: 2021-02-19 11:05:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dd7e7fed7ea30837f2c3567673c9cb57 SHA-1: 84efc2107db5c338efc0967ffaaa577e54bf0b49 SHA-256: cab1669d32229a709df2bd712a390fcc1b609ffbdd1a3130da5c2abc5622b537
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/123?utm_term=hp+deskjet+5550+driver+windows+10+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4503584/normal_5ffe90730a0e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_601d3ea70ca80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_601c79fd8bbee.pdfIn PDF document text
    • https://gaditefu.weebly.com/uploads/1/3/2/7/132712385/bililero.pdfIn PDF document text
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/3a52105.pdfIn PDF document text
    • http://centerverifybadge.com/hp_probook_6570b_price_in_indiaj6jsp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473432/normal_600fcc4f41f35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367644/normal_5ff11e1f02df3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388156/normal_5fdf63e4dc962.pdfIn PDF document text
    • https://fesubinilare.weebly.com/uploads/1/3/1/8/131856970/e9f7939.pdfIn PDF document text
    • https://peniseguj.weebly.com/uploads/1/3/2/7/132712198/pulumuxaxorasi-musutetojobugi-rofisowugefonat-sifomisovipoji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487201/normal_600044459ab66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416500/normal_5ff1d95187a4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496812/normal_5fcdc0db991f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446770/normal_5fd8dd6eaf2b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447884/normal_5fffd1a4ced16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448540/normal_60091534020a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491432/normal_601752d4dcd54.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16B 5524 bytes
SHA-256: b0c3d3a53689b11115c327f3c733983e19048a77e8fa00f8abb417b7b8153ae1
font_01_sfnt_off0000e467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE467 10104 bytes
SHA-256: 7ee469b687b995fbda2e8464c912dbb1c7731ca70324ab0a0101db2fbce7c5cd

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